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Research & Development

Research and development at SLV Berlin-Brandenburg is application-oriented, customer-oriented and aims at our core competence, the friction stir welding process. As the know-how carrier of friction stir welding, it is important to the SLV Berlin-Brandenburg to contribute to the spread of the process and to present its existing portfolio in this regard below.

In 1991 the friction stir welding process was introduced to the public by The Welding Institute (TWI) in England. As early as 1998, the GSI branch became one of the first German licensees and since then has been operating the process on behalf of customers and for various research projects. As part of a working group of the International Institute of Welding (IIW), the SLV Berlin-Brandenburg also developed a standard for this process (DIN EN ISO 25239 Parts 1 to 5), which came into force in 2012.

With friction stir welding, the parts to be joined are not melted, but turned into a doughy state and then stirred with a special tool while continuously advancing. Compared to conventional fusion welding processes, this has considerable advantages, such as a high and reproducible seam quality, high productivity, no reworking with little distortion. The range of materials suitable for the process has been steadily expanded and today includes not only aluminum but also copper and steel.

The machine technology of the SLV Berlin-Brandenburg consists of a friction stir welding machine ESAB Legio 3UT and a conventional flat bed milling machine. Both systems are suitable for working on workpieces of different sizes and changing requirement profiles. By using the milling machine, the application of the process is also interesting for companies that do not want to purchase their own friction stir welding machine. The machine technology of the GSI branch is completed by a turntable from Haane, which can be coupled with the ESAB system, as well as a rotating device that is suitable for operation on both systems. This makes it possible to weld rotationally symmetrical components with the usual high quality.

A new field of activity of the SLV Berlin-Brandenburg is the training and testing of operators for the friction stir welding process. Corresponding seminars are held directly on site in order to minimize customer expenditure as best as possible.

Friction stir welding and the possibilities available to it in the SLV Berlin-Brandenburg are advantages for customers from the aerospace industry, shipbuilding, automobile and commercial vehicle construction, rail vehicle construction and general plant construction.

You can find new seminars on friction stir welding, operator training and testing (according to DIN EN ISO 25239-3) and process tests (according to DIN EN ISO 25239-4) in the education search at www.gsi-slv.de.